Cowell's age concerns over fatherhood

The American Idol judge proposed to the make-up artist earlier this year (10), and the couple is currently planning its wedding.

But Cowell, 50, admits that the thought of becoming a father troubles him because of his age.

In a candid chat with Oprah Winfrey, he admits, "I worry about that (having children) because of my age. When I was younger, my dad used to play soccer and games with me and I worry - I worry that if I was 70..."